/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package ru.miit.elearning.servlets.pages;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.Session;
import ru.miit.elearning.hibernate.dao.CourseDAO;
import ru.miit.elearning.hibernate.dao.HibernateUtil;
import ru.miit.elearning.hibernate.dto.CurriculumLevel;

/**
 *
 * @author Cyclone
 */
public class LabsServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        //PrintWriter out = response.getWriter();


        Session session = null;

        try {

            String listType = null;
            for (Cookie cookie : request.getCookies()) {
                if (cookie.getName().toLowerCase().equals("list")) {
                    listType = cookie.getValue();
                    break;
                }
            }
            if (listType == null) {
                listType = "group";
            }

            session = HibernateUtil.getSessionFactory().getCurrentSession();
            session.beginTransaction();
            CourseDAO courseDAO = new CourseDAO(session);

            int currentUserId = courseDAO.findUserIdByLogin(request.getRemoteUser());

            if (listType.equals("plain")) {
                String sort = request.getParameter("sort");
                List<CurriculumLevel> labList = null;

                if (request.isUserInRole("admin")) {
                    labList = courseDAO.findLabsByPage(0, 32565, sort);

                } else {
                    if (request.isUserInRole("tutor")) {
                        labList = courseDAO.findLabsByPageByTutor(0, 32565, sort, currentUserId);
                    }
                }

                request.setAttribute("labList", labList);
            } else {
                // listType.equals("group")
                List<CurriculumLevel> courseList = null;
                if (request.isUserInRole("admin")) {
                    courseList = courseDAO.findAllCourses("title");
                } else {
                    if (request.isUserInRole("tutor")) {
                        courseList = courseDAO.findCoursesByTutor(currentUserId, "title");
                    }
                }

                request.setAttribute("courseList", courseList);
            }

            //String sort = request.getParameter("sort");



            List<CurriculumLevel> directionList = null;
            if (request.isUserInRole("admin")) {
                directionList = courseDAO.findAllDirections();

                for (CurriculumLevel direction : directionList) {
                    request.setAttribute("courseList_" + direction.getId(), new ArrayList(direction.getCurriculumLevels()));
                }
            } else {
                if (request.isUserInRole("tutor")) {
                    directionList = courseDAO.findDirectionsByTutor(currentUserId);

                    for (CurriculumLevel direction : directionList) {
                        request.setAttribute("courseList_" + direction.getId(), new ArrayList(courseDAO.findCoursesByTutorByDirection(currentUserId, direction.getId())));
                    }
                }
            }



            request.setAttribute("directionList", directionList);

            getServletContext().getRequestDispatcher("/labs.jsp").forward(request, response);
            if (session != null && session.isOpen()) {
                session.getTransaction().commit();
            }
        } catch (Exception e) {
            e.printStackTrace();

            ServletContext sc = getServletContext();
            String message = (String) sc.getAttribute("massage");
            sc.setAttribute("message", (message != null ? message : "") + "<p>Произошла ошибка запроса списка практических работ</p>");
            sc.getRequestDispatcher("/labs.jsp").forward(request, response);
            if (session != null && session.isOpen()) {
                session.getTransaction().rollback();
            }

        } finally {
            //out.close();
            if (session != null && session.isOpen()) {
                session.close();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
